Pumping apparatus.



R. CONRDER. PUMPING APPARATUS. APPLICATION FILED 133044.11905,

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UNITED 'STATES PATENT oFFIon.

' rRI'ID'OLPII coNRADER, oF ERIE, PENNSYLVANIA.

l PUMDING. APPARATUS'.

No. @1,143.7 i

itconcern.:

Be itknown that-I, RUDOLPH CONRADER, a citizen of thelUnited States,residing at Erie, in the ,countyj'o'f Erie and State of Pennsyl- Vania,"haveinvented new and useful Improvementsfin PumpingApparatus, of whichthe following is a' specification.

ThisA invention Arelates to pumping apparatus andit consists in certainimprovements Io in the construction thereof, as will be hereinafterfullyj described, and pointed out in the claims.-

I'Ieretofore considerable difficulty has been encountered in pumpingdeep wells by reason of the bending or twisting of the suckerrods whenon the downward stroke or, in other words, when the sucker-rod is putunder compression. This has been particularly troublesome with metallicsucker-rods,

2o and as a result of this twisting or bending the tubing has often beenworn entirely through.

The object of this invention is to obviate this difficulty.

The invention is illustrated in the accompanying drawings as follows:

Figure 1 shows a section on the line 1 1 in Fig. 2; Fig. 2, a'section onthe line 2 2 in Fig. 1.

A marks the tubing; B, the sucker-rod.

3o The sucker-rod shown is a hollow one, and in order to get the fullstrength of the rod at the ends it is upset at b, so as to compensatefor what is cut away with the thread. The rods are joined together by anordinary threaded 3 5 coupling B.

A sleeve C is threaded to the sucker-rod B, the opening c through thesleeve being smaller than the enlargement b. In the manufacture of thesucker-rod the sleeve is put in 4o place prior to the upsetting of therod.' The sleeve has the recesses c to ment of liquid past the s eeves.One of these sleeves is placed on each sucker-rod. It will be noted thatit is free to move rela- 4 5 tively to the tubing and to the sucker-rod,so that the sucker-rod will move through the sleeve if it presents lessfriction than the tub Specification of Letters Patent. Application filedDecember 14, 1905. Serial No. 291,717. I

Patented` sept. 18,1906. l

ing, or the sleeve will move in the tubing with thesucker-rod if thereis less friction on the tubing than the weight of the sleeve.

What I claim as new is- 1. In a pumping apparatus, the combination witha sucker-rod and surrounding tube of a sleeve Within. the tubing aroundthe rod for' guiding the rod andlthrough whichl the rod is free to move.

2. In a pumping apparatus, the combination with a suc er-rod of a sleevesurrounding the rod and free to move relatively to the rod.

8. In a pumping apparatus, the combination of a sucker-rod andsurrounding tube;

of a sleeve arranged Within the tube* and around the rod for guiding therod, said sleeve being free to move relatively to the tube and to therod.

4. In a pumping apparatus, the combina tion with a suc er-rod havingupset ends; of a sleeve surrounding the rod between the upset ends, theopeningfthrough the sleeve being smaller than the upset end. u

5. In a pum ing apparatus the comblna tion with a suc rer-rod havingupset ends.; of a sleeve surrounding the rod between the up'- set ends,the opening through the sleeve being smaller than the upset end.

6. In a pumping ap aratus, the combination with a sucker-ro of arecessed sleeve surrounding the rod and free to move relatively'to therod.

7. In a pum ing apparatus the combination with a suc er-rod having upsetends; of a sleeve surrounding the rod between the upset ends, theopening through the sleeve being smaller than the upset end, said sleevebeing -provided with recesses.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing Witnesses H. c. LORD, G. M, RAINsFoRD.

